I had a whole 5-man squad get overwhelmed in one turn despite all standard marines using overwatch because one storm bolter jammed and let a flood of 'Nids into the room. They killed *everyone* in a single turn, and it wasn't even close. I feel like if Terminators were actually this fragile and ineffective at fighting genestealers it'd be far cheaper and more logical to just flood space hulks with Eversor assassins or Arco Flagellants...